WO1993020340A3 - Methods and device for assessing the operatability of a catalytic converter - Google Patents

Methods and device for assessing the operatability of a catalytic converter Download PDF

Info

Publication number
WO1993020340A3
WO1993020340A3 PCT/DE1993/000257 DE9300257W WO9320340A3 WO 1993020340 A3 WO1993020340 A3 WO 1993020340A3 DE 9300257 W DE9300257 W DE 9300257W WO 9320340 A3 WO9320340 A3 WO 9320340A3
Authority
WO
WIPO (PCT)
Prior art keywords
catalytic converter
temperature
operable
conversion
designed
Prior art date
Application number
PCT/DE1993/000257
Other languages
German (de)
French (fr)
Other versions
WO1993020340A2 (en
Inventor
Klaus Ries-Mueller
Original Assignee
Bosch Gmbh Robert
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6455904&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1993020340(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Bosch Gmbh Robert filed Critical Bosch Gmbh Robert
Priority to US08/157,089 priority Critical patent/US5675967A/en
Priority to JP5516961A priority patent/JPH06508414A/en
Priority to DE59301093T priority patent/DE59301093D1/en
Priority to EP93905208A priority patent/EP0587836B2/en
Publication of WO1993020340A2 publication Critical patent/WO1993020340A2/en
Publication of WO1993020340A3 publication Critical patent/WO1993020340A3/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/005—Electrical control of exhaust gas treating apparatus using models instead of sensors to determine operating characteristics of exhaust systems, e.g. calculating catalyst temperature instead of measuring it directly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/02—Catalytic activity of catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The methods described for assessing the operatability of a catalytic converter fitted in the exhaust of an internal-combustion engine make use of the fact that the conversion-onset temperature for a catalytic converter is higher the older the catalytic converter is. Improved variants of the invention also make use of the fact that, after conversion has started, a catalytic converter produces less heat per unit time from the combustion of oxidizable exhaust components the older it is. A first method is designed to investigate when a catalytic converter starts converting and to designate the converter as operable when the measured temperature lies below a given comparison temperature. A second method is designed to operate the catalytic converter in accordance with precisely defined conditions and to investigate how long it takes for conversion to begin. If the measured length of time is less than a comparison time, the catalytic converter is operable. A third method is designed to estimate the temperature of the catalytic converter by means of a model. As soon as the estimated temperature reaches a comparison temperature, the temperature of the catalytic converter is measured to determine whether it has exceeded the estimated temperature. If this is the case, the catalytic converter is considered to be operable. Devices as proposed by the invention include equipment for carrying out the operations necessary for the methods described.
PCT/DE1993/000257 1992-04-03 1993-03-20 Methods and device for assessing the operatability of a catalytic converter WO1993020340A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US08/157,089 US5675967A (en) 1992-04-03 1993-03-20 Method and arrangement for evaluating the operability of a catalytic converter
JP5516961A JPH06508414A (en) 1992-04-03 1993-03-20 Method and apparatus for determining the functional capacity of a catalyst
DE59301093T DE59301093D1 (en) 1992-04-03 1993-03-20 METHOD AND DEVICE FOR EVALUATING THE FUNCTIONALITY OF A CATALYST.
EP93905208A EP0587836B2 (en) 1992-04-03 1993-03-20 Methods and device for assessing the operatability of a catalytic converter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4211092.0 1992-04-03
DE4211092A DE4211092A1 (en) 1992-04-03 1992-04-03 Method and device for assessing the functionality of a catalytic converter

Publications (2)

Publication Number Publication Date
WO1993020340A2 WO1993020340A2 (en) 1993-10-14
WO1993020340A3 true WO1993020340A3 (en) 1994-01-06

Family

ID=6455904

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1993/000257 WO1993020340A2 (en) 1992-04-03 1993-03-20 Methods and device for assessing the operatability of a catalytic converter

Country Status (5)

Country Link
US (1) US5675967A (en)
EP (1) EP0587836B2 (en)
JP (1) JPH06508414A (en)
DE (2) DE4211092A1 (en)
WO (1) WO1993020340A2 (en)

Families Citing this family (72)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3331758B2 (en) * 1994-07-25 2002-10-07 株式会社デンソー Temperature control device for exhaust gas purifier
DE4330997A1 (en) * 1993-09-13 1995-03-16 Bosch Gmbh Robert Method for monitoring the light-off performance of a catalytic converter system in a motor vehicle
US5419122A (en) * 1993-10-04 1995-05-30 Ford Motor Company Detection of catalytic converter operability by light-off time determination
JP3244584B2 (en) * 1994-02-10 2002-01-07 株式会社日立製作所 Diagnosis method and apparatus for engine exhaust gas purification device
DE4426020B4 (en) * 1994-07-22 2005-07-28 Robert Bosch Gmbh Method and device for monitoring the functionality of a catalyst in the exhaust passage of an internal combustion engine
US6523340B1 (en) * 1995-02-10 2003-02-25 Hitachi, Ltd. Method and apparatus for diagnosing engine exhaust gas purification system
JP3456058B2 (en) * 1995-02-10 2003-10-14 株式会社デンソー Catalyst deterioration detection device and exhaust gas purification device abnormality detection device
DE69521610T2 (en) 1995-03-16 2002-05-08 Hyundai Motor Co Ltd DEVICE AND METHOD FOR DETERMINING THE DEGRADATION OF A DEVICE FOR DETECTING THE OXYGEN CONTENT FOR A CATALYTIC DEVICE
JP3239698B2 (en) * 1995-07-25 2001-12-17 トヨタ自動車株式会社 Catalyst deterioration determination device for internal combustion engine
DE19541903A1 (en) * 1995-11-10 1997-05-15 Bayerische Motoren Werke Ag Monitoring system for the exhaust gas purification of an internal combustion engine
JP3830568B2 (en) * 1995-12-18 2006-10-04 日本碍子株式会社 Exhaust gas purification catalyst deterioration detection method
DE19645202B4 (en) * 1995-12-23 2006-05-11 Volkswagen Ag Method for monitoring the conversion rate of an exhaust gas catalytic converter for an internal combustion engine
JP3674017B2 (en) 1996-03-19 2005-07-20 株式会社デンソー Catalyst degradation detection device for exhaust gas purification
US5787705A (en) * 1996-08-30 1998-08-04 General Motors Corporation Catalyst diagnostic
US5722236A (en) * 1996-12-13 1998-03-03 Ford Global Technologies, Inc. Adaptive exhaust temperature estimation and control
JP3262157B2 (en) * 1997-01-24 2002-03-04 本田技研工業株式会社 Fuel supply control device for internal combustion engine
US5822979A (en) * 1997-02-24 1998-10-20 Ford Global Technologies, Inc. Catalyst monitoring using a hydrocarbon sensor
DE19714293C1 (en) * 1997-04-07 1998-09-03 Siemens Ag Procedure for checking the convertibility of a catalytic converter
DE19726791A1 (en) * 1997-06-24 1999-01-07 Volkswagen Ag Method for monitoring the conversion rate of an exhaust gas catalytic converter for an internal combustion engine
DE19736233C2 (en) * 1997-08-20 2001-03-29 Siemens Ag Procedure for checking a catalyst
US5996337A (en) * 1998-02-06 1999-12-07 Engelhard Corporation Dynamic calorimetric sensor system
DE19811574A1 (en) * 1998-03-17 1999-09-23 Siemens Ag Vehicle internal combustion (IC) engine catalyst functionability monitoring method
US6202406B1 (en) * 1998-03-30 2001-03-20 Heralus Electro-Nite International N.V. Method and apparatus for catalyst temperature control
US6050128A (en) * 1998-05-28 2000-04-18 Ford Global Technologies, Inc. Catalyst deterioration monitoring
US6131439A (en) * 1998-05-28 2000-10-17 Ford Global Technologies, Inc. Catalyst deterioration detection with sensor calibration
US6354076B1 (en) * 1998-07-16 2002-03-12 Honda Giken Kogyo Kabushiki Kaisha Exhaust gas purification system of internal combustion engine
CN1166855C (en) * 1998-07-17 2004-09-15 本田技研工业株式会社 Method for judging deteriration of emission gas control catalyst device
DE19835748A1 (en) * 1998-08-07 2000-02-10 Daimler Chrysler Ag Process for the simulated formation of a signal representing the current catalyst temperature
US6651422B1 (en) 1998-08-24 2003-11-25 Legare Joseph E. Catalyst efficiency detection and heating method using cyclic fuel control
US7886523B1 (en) 1998-08-24 2011-02-15 Legare Joseph E Control methods for improved catalytic converter efficiency and diagnosis
US7707821B1 (en) 1998-08-24 2010-05-04 Legare Joseph E Control methods for improved catalytic converter efficiency and diagnosis
DE19850338C2 (en) 1998-11-02 2001-11-22 Heraeus Electro Nite Int Method and device for checking and monitoring the aging of a catalytic converter in the exhaust gas of internal combustion engines and the emission of pollutants
DE19907382A1 (en) * 1999-02-20 2000-08-24 Bayerische Motoren Werke Ag Engine catalyser temperture estimation method uses temperature model for calculating catalyst temperature in dependence on measured or calculated exhaust gas temperature
DE19933712A1 (en) * 1999-07-19 2001-05-17 Volkswagen Ag Method for controlling an operating mode of an internal combustion engine
DE60027987T8 (en) * 1999-11-09 2007-02-15 Honda Giken Kogyo K.K. Control system for an internal combustion engine
DE19955947C2 (en) 1999-11-19 2002-04-11 Heraeus Electro Nite Int Process for checking the catalytic activity of a catalyst
DE19955972C2 (en) * 1999-11-19 2002-03-14 Heraeus Electro Nite Int Procedure for calibrating a temperature sensor
DE19957185A1 (en) * 1999-11-27 2001-05-31 Volkswagen Ag Controlling heating-up phase of catalyst arranged in exhaust gas channel of IC engine comprises determining engine load during heating-up phase and partially stopping heating measures in load phases
JP4312325B2 (en) * 1999-12-28 2009-08-12 本田技研工業株式会社 Degradation state evaluation method of exhaust gas purification catalyst device
DE19963924A1 (en) * 1999-12-31 2001-07-12 Bosch Gmbh Robert Method for operating a storage catalytic converter of an internal combustion engine
DE19963925A1 (en) * 1999-12-31 2001-07-12 Bosch Gmbh Robert Method for operating a storage catalytic converter of an internal combustion engine
US6523341B1 (en) 2000-01-07 2003-02-25 Ford Global Technologies, Inc. Cold start vehicle catalyst monitor
DE10013893A1 (en) * 2000-03-21 2001-09-27 Dmc2 Degussa Metals Catalysts Method for checking the functionality of an exhaust gas purification catalytic converter
DE10031924A1 (en) 2000-06-30 2002-01-10 Bosch Gmbh Robert Effectiveness checking method for heating catalytic converter in internal combustion engine, involves evaluating heating measure based on comparison result of catalytic converter temperature with predetermined value
US6408616B1 (en) * 2000-07-20 2002-06-25 Ford Global Technologies, Inc. Diesel OBD-II system for detection of degradation of catalyst activity
US6363713B1 (en) * 2000-07-20 2002-04-02 Ford Global Technologies, Inc. On-board diagnostics for detecting the operation of diesel emissions control system
DE10038461B4 (en) * 2000-08-07 2009-12-24 Volkswagen Ag Model for a NOx storage catalyst
DE10065123B4 (en) * 2000-12-28 2012-12-20 Robert Bosch Gmbh Method for controlling a diagnosis of a catalyst in the exhaust gas of an internal combustion engine
US6668545B2 (en) * 2001-03-30 2003-12-30 General Motors Corporation Catalyst warm-up assessment method for a motor vehicle catalytic converter
US7121085B2 (en) * 2001-09-04 2006-10-17 Ford Global Technologies, Llc Method and apparatus for controlling hydrocarbon injection into engine exhaust to reduce NOx
DE10300555B4 (en) * 2002-01-10 2009-03-19 Toyota Jidosha Kabushiki Kaisha, Toyota-shi A deterioration determination device for an engine exhaust gas control device and deterioration determination method
DE10248431A1 (en) * 2002-10-17 2004-04-29 Robert Bosch Gmbh Method for recognizing the loading of a particle filter
DE10257172B4 (en) * 2002-12-03 2011-06-22 Volkswagen AG, 38440 Method for operating an internal combustion engine with a flexible adaptation of the component protection design
DE10323247A1 (en) * 2003-05-22 2004-12-09 Umicore Ag & Co.Kg Method for operating a drive system from a diesel engine with a diesel oxidation catalyst for exhaust gas purification
DE102004004277A1 (en) * 2004-01-27 2005-09-22 Audi Ag Method for assessing the quality of an internal combustion engine of a vehicle, in particular a motor vehicle, downstream catalytic converter
DE102004006882B4 (en) * 2004-02-12 2007-10-04 Audi Ag Method for controlling the mixture enrichment of a lean-running internal combustion engine of a vehicle, in particular of a motor vehicle
DE102004058714B4 (en) * 2004-12-06 2006-08-31 Siemens Ag Method and device for checking temperature values of a temperature sensor of an internal combustion engine
US8544258B2 (en) * 2005-09-23 2013-10-01 GM Global Technology Operations LLC Exhaust treatment system diagnostic via ammonium nitrite decomposition
US8112988B2 (en) * 2006-03-16 2012-02-14 Ford Global Technologies, Llc System and method for desulfating a NOx trap
DE102007045256A1 (en) * 2007-09-21 2009-04-02 Volkswagen Ag Method for testing the operability of an oxidation catalytic converter of an internal combustion engine
DE102008041385A1 (en) 2008-08-20 2010-02-25 Robert Bosch Gmbh Catalyzer's operability examining method for motor vehicle, involves evaluating catalyzer as defective, when temperature is higher than pre-determined threshold value by application of pollutant conversion
JP5604852B2 (en) * 2009-11-06 2014-10-15 トヨタ自動車株式会社 Internal combustion engine catalyst device temperature estimation device
US20120222399A1 (en) * 2011-03-03 2012-09-06 GM Global Technology Operations LLC Oxidation catalyst burn threshold adjustment to avoid quenching
KR101305632B1 (en) * 2011-09-21 2013-09-09 기아자동차주식회사 System and method for detecting pollution by toxic substance for air exhauster of vehicle
DE102011115328A1 (en) 2011-10-07 2013-04-11 Mtu Friedrichshafen Gmbh Method for monitoring an exhaust system
DE102011119214A1 (en) * 2011-11-23 2013-05-23 Daimler Ag Method for determining conversion capability of oxidation catalyst of exhaust gas treatment device for internal combustion engine used in motor vehicle, involves determining reference amplitude of sensor signal by lambda probe
DE102012022840A1 (en) * 2012-11-23 2014-05-28 Audi Ag Method for checking catalytic converter of motor vehicle, involves detecting measurement signal of sensor based on temperature of catalytic converter to verify catalytic performances of exhaust gas catalyst
US20170234197A1 (en) * 2016-02-12 2017-08-17 GM Global Technology Operations LLC Vehicle oxidation catalyst diagnostic strategy
KR101816426B1 (en) * 2016-08-01 2018-01-08 현대자동차주식회사 Method for catalyst heating control
US11359529B2 (en) * 2020-03-02 2022-06-14 GM Global Technology Operations LLC Monitoring of diesel oxidation catalyst in aftertreatment assembly
DE102020126961A1 (en) 2020-10-14 2022-04-14 Bayerische Motoren Werke Aktiengesellschaft Method for determining a condition of a catalytic converter and exhaust aftertreatment device
DE102021114932A1 (en) 2021-06-10 2022-12-15 Bayerische Motoren Werke Aktiengesellschaft Method for operating an exhaust aftertreatment device for an internal combustion engine and control unit

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1373826A (en) * 1971-08-09 1974-11-13 Nissan Motor Motor vehicle exhaust system including a catalytic converter
DE3516981A1 (en) * 1985-05-10 1986-11-13 Audi AG, 8070 Ingolstadt Method for checking the functionality of an exhaust gas catalyst
EP0236659A1 (en) * 1986-01-14 1987-09-16 FIAT AUTO S.p.A. Device for protecting the catalyst in a catalytic silencer for motor vehicles
JPH0315619A (en) * 1989-06-12 1991-01-24 Nissan Motor Co Ltd Failure diagnosing device for secondary air induction system for internal combustion engine
EP0433735A1 (en) * 1989-12-22 1991-06-26 FIAT AUTO S.p.A. Alarm device for the protection of catalytic converters for the exhaust gases of endothermic motors
DE4122787A1 (en) * 1990-07-23 1992-01-30 Volkswagen Ag Catalytic converter monitoring schemes for an IC engine - using computed outlet temp. values useful for automobile engine management systems

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2304622A1 (en) * 1973-01-31 1974-08-15 Bosch Gmbh Robert DEVICE FOR MONITORING CATALYTIC REACTORS IN EXHAUST GAS DETOXIFICATION SYSTEMS OF COMBUSTION MACHINES
DE2444334A1 (en) * 1974-09-17 1976-03-25 Bosch Gmbh Robert METHOD AND EQUIPMENT FOR MONITORING THE ACTIVITY OF CATALYTIC REACTORS
DE2643739C2 (en) † 1976-09-29 1986-03-13 Robert Bosch Gmbh, 7000 Stuttgart Method for monitoring the activity of catalytic converters for exhaust gas purification
JPS5535181A (en) † 1978-09-05 1980-03-12 Nippon Denso Co Ltd Air fuel ratio control device
CH668620A5 (en) † 1984-04-12 1989-01-13 Daimler Benz Ag METHOD FOR CHECKING AND ADJUSTING CATALYTIC EXHAUST GAS PURIFICATION PLANTS OF COMBUSTION ENGINES.
DE3500594C2 (en) * 1985-01-10 1995-08-17 Bosch Gmbh Robert Metering system for an internal combustion engine to influence the operating mixture
CA1268529A (en) † 1985-07-31 1990-05-01 Toyota Jidosha Kabushiki Kaisha Double air-fuel ratio sensor system carrying out learning control operation
US4656829A (en) † 1986-01-27 1987-04-14 General Motors Corporation System for predicting catalytic converter temperature
US4947818A (en) † 1988-04-28 1990-08-14 Toyota Jidosha Kabushiki Kaisha Internal combustion engine with device for warning of malfunction in an air-fuel ratio control system
US5060473A (en) * 1988-07-13 1991-10-29 Nissan Motor Company, Limited System for detecting deterioration of catalyst in catalytic converter
GB9003316D0 (en) * 1990-02-14 1990-04-11 Lucas Ind Plc Monitoring of operation of catalytic converter
EP0521050B1 (en) † 1990-03-19 1999-06-02 Emitec Gesellschaft für Emissionstechnologie mbH Process and device for controlling an internal combustion engine in function of the actual temperature of a downstream catalyst
JP2943433B2 (en) † 1990-08-24 1999-08-30 株式会社デンソー Catalyst purification rate detector

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1373826A (en) * 1971-08-09 1974-11-13 Nissan Motor Motor vehicle exhaust system including a catalytic converter
DE3516981A1 (en) * 1985-05-10 1986-11-13 Audi AG, 8070 Ingolstadt Method for checking the functionality of an exhaust gas catalyst
EP0236659A1 (en) * 1986-01-14 1987-09-16 FIAT AUTO S.p.A. Device for protecting the catalyst in a catalytic silencer for motor vehicles
JPH0315619A (en) * 1989-06-12 1991-01-24 Nissan Motor Co Ltd Failure diagnosing device for secondary air induction system for internal combustion engine
EP0433735A1 (en) * 1989-12-22 1991-06-26 FIAT AUTO S.p.A. Alarm device for the protection of catalytic converters for the exhaust gases of endothermic motors
DE4122787A1 (en) * 1990-07-23 1992-01-30 Volkswagen Ag Catalytic converter monitoring schemes for an IC engine - using computed outlet temp. values useful for automobile engine management systems

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 15, no. 129 (M - 1098) 28 March 1991 (1991-03-28) *

Also Published As

Publication number Publication date
EP0587836B1 (en) 1995-12-06
US5675967A (en) 1997-10-14
EP0587836A1 (en) 1994-03-23
DE4211092A1 (en) 1993-10-07
DE59301093D1 (en) 1996-01-18
WO1993020340A2 (en) 1993-10-14
JPH06508414A (en) 1994-09-22
EP0587836B2 (en) 1999-11-17

Similar Documents

Publication Publication Date Title
WO1993020340A3 (en) Methods and device for assessing the operatability of a catalytic converter
DE69829337D1 (en) Device for reactivating the catalytic converter of an internal combustion engine
ATE169841T1 (en) METHOD FOR THE CATALYTIC CONVERSION OF NITROGEN OXIDES CONTAINED IN THE EXHAUST GAS OF AN COMBUSTION ENGINE
ATE259934T1 (en) DEVICE AND METHOD FOR DENOTICING EXHAUST GAS OF AN INTERNAL COMBUSTION ENGINE
DE69204807T2 (en) Device for determining the deterioration of a catalytic converter of an internal combustion engine.
EP1048830A3 (en) Method and system for estimating a midbed temperature of a catalytic converter
DE69303258D1 (en) Device for determining the deterioration of an internal combustion engine catalytic converter
EP0161692A3 (en) Sound-absorbing device for use as muffler for exhaust gas from an internal combustion engine
DE60311044D1 (en) Starting method and starting device for an internal combustion engine, method and apparatus for estimating the used energy during cranking
DE69306511D1 (en) Device for determining the deterioration of a catalytic converter of an internal combustion engine
WO1999047795A3 (en) Method and device to monitor the functioning of a catalyst in an internal combustion engine
EP0999352A3 (en) Method and apparatus for controlling and monitoring the ageing of a catalytic converter in the exhaust gas of internal combustion engines and of the harmful emissions
DE69707996T2 (en) Device for determining the deterioration of a catalytic converter of an internal combustion engine
DE60201407D1 (en) Method and device for monitoring the operating state of a catalytic converter in the exhaust line of an internal combustion engine
DE50110750D1 (en) DEVICE AND METHOD FOR DETERMINING A REGENERATION NEED FOR AN NOx NO STORAGE CATALYST
EP1128051A3 (en) Exhaust-gas cleaning devices for an engine and a method of setting its fuel injection timing
DE60019231D1 (en) Recovery device for the waste heat of an internal combustion engine
DE69719395T2 (en) Device for determining the deterioration of a three-way catalytic converter of an internal combustion engine
EP1130239A3 (en) Engine exhaust purification device
PL370627A1 (en) Method for managing particulate filter backwashing means
DE3771393D1 (en) DEVICE FOR CONTROLLING THE IDLE OPERATION OF AN INTERNAL COMBUSTION ENGINE.
ATE264996T1 (en) METHOD AND DEVICE FOR CONTROLLING THE OPERATIONAL MODE OF AN INTERNAL COMBUSTION ENGINE
JPS52137533A (en) Exhaust return controller
DE50112217D1 (en) Device for controlling / regulating the regeneration of a NOX storage catalytic converter in the exhaust gas line of an internal combustion engine
DE50008987D1 (en) Method for starting an internal combustion engine of a vehicle equipped with a shutdown device and device for this purpose

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): JP KR RU US

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

WWE Wipo information: entry into national phase

Ref document number: 1993905208

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 08157089

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application
AK Designated states

Kind code of ref document: A3

Designated state(s): JP KR RU US

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

WWP Wipo information: published in national office

Ref document number: 1993905208

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1993905208

Country of ref document: EP